diff --git a/src/demo/reel.c b/src/demo/reel.c
index 6cf05e185..f27971bbe 100644
--- a/src/demo/reel.c
+++ b/src/demo/reel.c
@@ -336,7 +336,7 @@ ncreel_demo_core(struct notcurses* nc){
         break;
       case NCKEY_DEL: kill_active_tablet(pr, &tctxs); break;
       case NCKEY_RESIZE: notcurses_render(nc); break;
-      default: ncplane_printf_yx(std, 3, 2, "Unknown keycode (0x%x)\n", rw); break;
+      default: ncplane_printf_yx(std, 3, 2, "Unknown keycode (0x%lx)\n", (wint_t)rw); break;
     }
     if(newtablet){
       newtablet->next = tctxs;
diff --git a/src/demo/unicodeblocks.c b/src/demo/unicodeblocks.c
index f965e9555..7779a14d9 100644
--- a/src/demo/unicodeblocks.c
+++ b/src/demo/unicodeblocks.c
@@ -67,7 +67,8 @@ draw_block(struct ncplane* nn, uint32_t blockstart){
         if(bwc < 0){
           fprintf(stderr, "Couldn't convert %u (%x) (%lc) (%s)\n",
                   blockstart + chunk * CHUNKSIZE + z,
-                  blockstart + chunk * CHUNKSIZE + z, w, strerror(errno));
+                  blockstart + chunk * CHUNKSIZE + z,
+                  (wint_t)w, strerror(errno));
           return -1;
         }
         if(wcwidth(w) < 2){
diff --git a/src/lib/metric.c b/src/lib/metric.c
index e5642ea60..f2c456e29 100644
--- a/src/lib/metric.c
+++ b/src/lib/metric.c
@@ -69,9 +69,9 @@ const char *ncmetric(uintmax_t val, uintmax_t decimal, char *buf, int omitdec,
     // 1,024). That can overflow with large 64-bit values, but we can first
     // divide both sides by mult, and then scale by 100.
     if(omitdec && (val % dv) == 0){
-      sprintfed = sprintf(buf, "%ju%lc", val / dv, prefixes[consumed - 1]);
+      sprintfed = sprintf(buf, "%ju%lc", val / dv, (wint_t)prefixes[consumed - 1]);
     }else{
-      sprintfed = sprintf(buf, "%.2f%lc", (double)val / dv, prefixes[consumed - 1]);
+      sprintfed = sprintf(buf, "%.2f%lc", (double)val / dv, (wint_t)prefixes[consumed - 1]);
     }
     if(uprefix){
       buf[sprintfed] = uprefix;
@@ -83,13 +83,13 @@ const char *ncmetric(uintmax_t val, uintmax_t decimal, char *buf, int omitdec,
   // val / decimal < dv (or we ran out of prefixes)
   if(omitdec && val % decimal == 0){
     if(consumed){
-      sprintfed = sprintf(buf, "%ju%lc", val / decimal, subprefixes[consumed - 1]);
+      sprintfed = sprintf(buf, "%ju%lc", val / decimal, (wint_t)subprefixes[consumed - 1]);
     }else{
       sprintf(buf, "%ju", val / decimal);
     }
   }else{
     if(consumed){
-      sprintfed = sprintf(buf, "%.2f%lc", (double)val / decimal, subprefixes[consumed - 1]);
+      sprintfed = sprintf(buf, "%.2f%lc", (double)val / decimal, (wint_t)subprefixes[consumed - 1]);
     }else{
       sprintf(buf, "%.2f", (double)val / decimal);
     }
diff --git a/src/poc/linuxconjammer.c b/src/poc/linuxconjammer.c
index 0db7a4971..101dce5ee 100644
--- a/src/poc/linuxconjammer.c
+++ b/src/poc/linuxconjammer.c
@@ -217,7 +217,7 @@ jam_linux_consolemap(int fd, unsigned upper, unsigned lower){
   for(int i = 0 ; i < map.entry_ct ; ++i){
     wchar_t w = map.entries[i].unicode;
     printf(" %05hx (%lc)->%3hu ", map.entries[i].unicode,
-           iswprint(w) ? w : L' ', map.entries[i].fontpos);
+           (wint_t)(iswprint(w) ? w : L' '), map.entries[i].fontpos);
     if(i % 4 == 3){
       printf("\n");
     }
diff --git a/src/poc/linuxconsole.c b/src/poc/linuxconsole.c
index 477304d2f..0f1a5ad34 100644
--- a/src/poc/linuxconsole.c
+++ b/src/poc/linuxconsole.c
@@ -152,9 +152,9 @@ get_linux_consolemap(int fd){
   }
   printf("Unicode->font entries: %hu\n", map.entry_ct);
   for(int i = 0 ; i < map.entry_ct ; ++i){
-    wchar_t w = map.entries[i].unicode;
+    wint_t w = map.entries[i].unicode;
     printf(" %05hx (%lc)->%3hu ", map.entries[i].unicode,
-           iswprint(w) ? w : L' ', map.entries[i].fontpos);
+           (wint_t)(iswprint(w) ? w : L' '), map.entries[i].fontpos);
     if(i % 4 == 3){
       printf("\n");
     }